Final answer:
Meiosis is the type of cell division that reduces the number of chromosomes by half. The terms that complete the statement are chromosomes and haploids, as during meiosis, diploid cells divide into haploid cells.
Step-by-step explanation:
Meiosis is the type of cell division in which the number of chromosomes is reduced by half. The correct terms that complete the statement are: b) Chromosomes, haploids. During meiosis, diploid cells divide to produce four haploid cells. In this process, the number of chromosomes is halved, resulting in gametes with half the number of chromosomes compared to the parent cell.